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High Energy, Nuclear, Particle Physics

- Properties, relationships, and interactions of subatomic particles. Exp. & theo. physics of nuclei & elementary particles
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Jan16-12 Greg Bernhardt
God particle is 'found': Scientists at Cern expected to announce on Wednesday Higgs boson particle has been discovered...
Jul18-14 12:32 PM
ChrisVer
187 58,749
rules Sticky Thread Pinned: Forum Rules
Before posting anything, please review the Physics Forums Global Guidelines. If you are seeking help with a...
Feb23-13 08:41 AM
ZapperZ
1 25,172
Hi. I am currently studying about representations of Lie algebras. I have two questions: 1. As I understand, when...
Jul12-14 11:00 PM
spookyfish
11 2,581
Hello, I have a gamma spectrum of one element (X). There are several gamma peak in the spectrum. For example, 800...
Jul10-14 03:19 PM
mfb
14 3,247
I'm stucked in a passage of Particle Physics (Martin B., Shaw G.) in page 41 regarding neutrino oscillations. ...
Jul10-14 03:15 PM
George Jones
6 2,265
How can someone think of the neutrinos as non relativistic? OK I understand for example that the neutrino temperature...
Jul9-14 04:55 PM
Orodruin
13 3,004
Wikipedia says CERN has isolated about 38 atoms of antihydrogen and maintained them for over 15 minutes? ... Do you...
Jul9-14 03:59 PM
SteamKing
5 2,425
Annihilation results in an extreme burst of energy..... If enough antimatter is isolated, it can be utilized for...
Jul9-14 02:49 AM
Syed Ammar
5 2,130
Hi I am trying to find the equations of a charged particle inside a dipole & quadripole. Practically, I need to...
Jul8-14 09:34 PM
Vanadium 50
6 1,948
"The question is very simple: do matter and antimatter obey the same laws of physics?.??
Jul8-14 02:28 PM
ChrisVer
4 2,051
I'm starting to learn about particle physics but I really want to see the whole picture before going deep. Here is...
Jul5-14 09:46 PM
Trifis
2 2,112
Hi! I try to construct the emission spectrum from relativistic electron rotating in homogeneous magnetic field -...
Jul5-14 10:06 AM
mfb
3 1,849
If uranium 238 is more stable than uranium 235 because 3 extra neutrons add to strong force then uranium 236 having 1...
Jul5-14 08:11 AM
mfb
5 3,245
I know that the nucleus can be considered a bunch of particles that constantly transition between protons and neutrons...
Jul4-14 05:31 PM
gildomar
3 2,254
Suppose we have a superfield \Phi(x,\theta,\bar{\theta}) this can be expanded in component fields in the standard way...
Jul3-14 01:17 PM
ChrisVer
2 2,390
Hi, is there a way to compute the escape velocity/kinetic energy of a newly created electron/positron pair ? Or in...
Jul2-14 05:10 PM
mfb
39 10,551
Hi I am re-reading Srednicki's QFT. In chapter 58, he points out that the Noether current $$...
Jun30-14 10:21 PM
cedricyu803
2 2,755
Hi Board, In the Spectrum of Co60 ...
Jun29-14 08:55 PM
echaniot
7 3,045
I have a problem with the calculus of magnetic moment of Li-6. The configuration of protons is 1p_{3/2}, and the...
Jun29-14 03:17 PM
PeterDonis
4 2,701
I have read that for a system of 2 particles, the total parity is given by: P=P_1 P_2 (-1)^L where - P_1, P_2=...
Jun28-14 09:50 AM
bznm
8 2,205
To find a new particle, the energy and momentum of the (decayed) particles are measured Evaluate the expression m^2...
Jun28-14 12:56 AM
Simon Bridge
5 2,369
Pauli's Principle says: "The wavefunction of two identical fermions must be totally antisymmetric". I know...
Jun28-14 12:43 AM
Simon Bridge
1 2,275
I know that a particle's exact anti-counterpart (i.e. an electron and positron) will annihilate into pure energy. But...
Jun26-14 06:12 PM
mfb
8 2,530
S=\int d^4x\frac{m}{12}A_μ ε^{μ \nu ρσ} H_{\nu ρσ} + \frac{1}{8} m^2A^μA_μ Where H_{\nu ρσ} = \partial_\nu B_{ρσ}...
Jun26-14 03:31 AM
bagherihan
6 2,152
I am sorry, this is a rather dump question- more like a notation question since the sources I've looked into don't...
Jun25-14 12:41 PM
ChrisVer
4 611
I have heard that perturbative quantum gravity calculation predicts an increase of constant G at large distances. ...
Jun24-14 06:10 PM
ChrisVer
2 638
When I opened up the "High Energy,Nuclear,Particle Physics" section, it was kind of like "Holy $#^*!!!- I don't know...
Jun24-14 12:44 PM
mfb
4 661
Because I am a little tired to think... For where does the mass difference between the W and Z bosons come from?
Jun24-14 12:22 PM
ChrisVer
6 661
why the topological term in gauge theory, ε_{\mu\nu ρσ}F^{\mu \nu} F^{ρσ} ,is scale-independent?
Jun24-14 06:20 AM
samalkhaiat
7 780
I have a question: With the detection of the Higgs Boson particle, if one were to remove all said particles from a...
Jun23-14 08:43 PM
ChrisVer
10 1,118
In the standard model gravitron is a particle but Higgs boson is not. The Higgs field causes particles to acquire...
Jun21-14 07:51 PM
mfb
18 1,297
Is there anywhere I can see the explicit derivation for a massless real scalar and for the EM field? thank you.
Jun21-14 12:16 PM
samalkhaiat
4 931
In case you have the Kahler and super- potential K,W: K(T,S,C) = -log (S +S^{*}) -3 log ( T+ T^{*} - C C^{*}) ...
Jun19-14 07:05 PM
ChrisVer
1 487
MIT bag model is a famous model, which can be used for calculating quark distribution function in hadrons. ...
Jun19-14 07:30 AM
Chenkb
0 519
Specifically in Carl D Anderson's cloud chamber experiment, the first experiment to prove the existence of the...
Jun18-14 06:45 PM
kurros
5 598
dear sir, i heard that that proton spins about itselfand this helps in stability of nucleus. i also heard...
Jun17-14 02:31 AM
shivakumar06
11 813
This article on Majorana particles: http://news.yahoo.com/hunt-source-matter-continues-130052152.html If neutrinos...
Jun16-14 09:45 PM
Matterwave
15 1,134
Dear PF, although I've gone through many particle phyics lectures and text books, I still have problems with wrap...
Jun15-14 05:56 PM
kurros
7 722
Ok so I recently read this article...
Jun15-14 06:01 AM
maajdl
1 611
Hi, While studying Lie groups and in particular the representations I have some trouble with determining whether a...
Jun14-14 12:37 PM
JorisL
2 628
Such as ##\Sigma^0 \to \bar{\Lambda}\gamma\gamma##. I want to make a complete collection of all these decay modes,...
Jun14-14 11:42 AM
mfb
10 665
I have read that the Z boson cannot change the flavour of a particle. So my assumption is that an interaction such as:...
Jun13-14 09:31 AM
Orodruin
13 857

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